How Minerals Form 4.2

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Vocab

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solution- a mixture when one substance dissolves in another
vein- a narrow channel or slab of mineral that is different from surrounding rock

Outline

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Processes That Form Minerals

• minerals have formed over a billion years ago
• minerals can form in two different ways
  • minerals form through crystallization of melted material
  • minerals form through crystallization of material dissolved in water

Minerals From Magma

• the way minerals are formed are from magma
  • when magma becomes lava, the lava cools and forms crystals
    • those crystals form from the lava
      • the lava cools quickly, and forms many crystals

Minerals From Hot Water Solutions

• another way minerals form is from solutions
  • minerals usually are from magma, but sometimes it melts
  • the minerals form through solutions, which is a mixture of dissolved substances
  • when the solutions start cooling, crystals form, and the crystals form minerals
• a vein is a slab of rock that is different from surrounding rock
  • solutions of hot water often fall down the veins
• minerals form solutions at the mid-ocean ridge
  • the mineral's form because of the crust.

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